WoW Freakz link:
Bug description: If you get a the brand buff from the Odyn fight, the one that increase your damage and healing capabilites, you instantly get an overflowing heal absorb from the affix, for 100% of your health. If you have 3 million hp, you will get a 3 million absorb.
Proof: http://imgur.com/a/AkDXH